Lubricating oil compositions

Details Lubricating oil compositions Lubricating oil compositions

2011-03-15

2011-03-15

Griffin, Walter D (Department: 1774)

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Organic -co- compound

C508S502000, C508S363000

Reexamination Certificate

active

07906469

ABSTRACT:
Lubricating oil compositions having a sulfated ash content of no more than 1.0 mass %, which contain a major amount of oil of lubricating viscosity, a minor amount of calcium salicylate detergent, an amount of a magnesium-based detergent providing the lubricating oil composition with at least 200 ppm of magnesium, an amount of a sulfur-containing molybdenum compound providing the lubricating oil composition with at least 20 ppm of molybdenum, and at least one nitrogen-containing dispersant providing the lubricating oil composition with at least 0.9 mass % nitrogen, which compositions provide improved top ring wear protection in internal combustion engines.

REFERENCES:
patent: 2003/0096716 (2003-05-01), Locke et al.
patent: 2003/0134756 (2003-07-01), Carrick et al.
patent: 2004/0102335 (2004-05-01), Carrick et al.
patent: 2004/0127371 (2004-07-01), Arrowsmith et al.
patent: 1 167 497 (2002-01-01), None
patent: 1 203 804 (2002-05-01), None
patent: 1 310 549 (2003-05-01), None
patent: WO2005/021693 (2005-03-01), None

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